Cody Jason Newton is a main character, as well as Marcella's best friend and Abby and Fig's 12-year-old brother, of Barney's Great Adventure. Cody initially acts as the antagonist until the end of the film, finally finding value in Barney's friendship and sense of imagination.
- Cody is the only character ever to be mean to Barney, until he apologizes near the end of Barney's Great Adventure.
- Next to The Winkster in Barney Live! In New York City, Cody is the closest thing to an antagonist to Barney. Unlike the Winkster who actually has a sense of humor, Cody is a mean kid and hates what he considers "kid stuff", but he cares deeply for his sister Abby and brother Fig.
- Although Cody isn't really a villain, he is considered to be a troubled antagonist.
- Cody and Abby's parents' names were never revealed or mentioned in the film, but their names are Colton and Kathryn "Kate" according to the transcript.